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import {
    Component,
    OnInit, ViewChild, ElementRef
} from '@angular/core';

import { Http, Response } from '@angular/http';
import { Headers, RequestOptions } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';

import { PersonData, RelationShipData, relationShipTypeEnum, TimeNetDataService } from './timenet.service';

import { Router } from '@angular/router';

export interface RowData {
    level: number;
    id: string;
    tag: string;
    value: string;
}

@Component({
  // The selector is what angular internally uses
  // for `document.querySelectorAll(selector)` in our index.html
  // where, in this case, selector is the string 'home'
  selector: 'home',  // <home></home>
  // We need to tell Angular's Dependency Injection which providers are in our app.
  providers: [  ],
  // Our list of styles in our component. We may add more to compose many styles together
  styleUrls: [ './home.component.css' ],
  // Every Angular template is first compiled by the browser before Angular runs it's compiler
  templateUrl: './home.component.html'
})
export class HomeComponent implements OnInit {
  private chartData: any[];

  @ViewChild('fileLoader') fileInput: ElementRef;

  private dragging: boolean;
  // TypeScript public modifiers
  constructor(
      public timeNetDataService: TimeNetDataService,
      public router: Router
  ) {}

  private dragCounter: number = 0;

  private isLoading: boolean = false;

  private fileName: string = '';

  public ngOnInit() {    // this.title.getData().subscribe(data => this.data = data);

  }

  handleDragEnter() {
    this.dragCounter++;
      this.dragging = true;
  }

  handleDragLeave() {
    this.dragCounter--;
    if(this.dragCounter===0)
      this.dragging = false;
  }

  handleDrop(e) {
      e.preventDefault();
      this.dragging = false;
      this.handleInputChange(e);
  }

  handleInputChange(e) {
      let file = e.dataTransfer ? e.dataTransfer.files[0] : e.target.files[0];

      let pattern = '\w*(.ged)$';
      let reader = new FileReader();
      if (!file.name.match(pattern)) {
          alert('invalid format');
          return;
      }

      this.processFile(file);
      /*this.loaded = false;

      reader.onload = this._handleReaderLoaded.bind(this);
      reader.readAsDataURL(file);*/
  }

  openFileLoader() {
      let event = new MouseEvent('click', { bubbles: true });
      this.fileInput.nativeElement.dispatchEvent(event);
  }
  /**
   * Parses the input file
   * @param event
   */
  fileChange(event) {
      let file: File = event.target.files[0];

      this.processFile(file);
  }

  processFile(file: File)
    {
        this.isLoading = true;
        this.fileName = file.name;
          console.log(file);
          console.log(this.fileName);
          let reader = new FileReader();
          let self = this;

          reader.onload = function (progressEvent) {
              // split into lines
              //
              let lines = this.result.split('\n');
              self.parseGedFile(lines);
          };
          reader.readAsText(file);

  }

  /**
   * Parses the file
   * @param lines
   */
  public parseGedFile(lines): void
  {

      let line = 0;
      let end: boolean = false;
      let currentRow: RowData;
      while (line < lines.length && !end) {
          currentRow = this.parseLine(lines[line]);
          if (currentRow.level === 0) {
              // reading meta data
              if (currentRow.tag === 'HEAD') {
                  let name: string;
                  let gedVersion: string;
                  let form: string;
                  let charset: string;
                  currentRow = this.parseLine(lines[++line]);
                  // iterate until lvl 0 is reached again
                  while (currentRow.level !== 0)
                  {
                      if (currentRow.level === 2 && currentRow.tag === 'NAME')
                          name = currentRow.value;

                      if (currentRow.level === 2 && currentRow.tag === 'VERS')
                          gedVersion = currentRow.value;

                      if (currentRow.level === 2 && currentRow.tag === 'FORM')
                          form = currentRow.value;

                      if (currentRow.level === 1 && currentRow.tag === 'CHAR')
                          charset = currentRow.value;

                      currentRow = this.parseLine(lines[++line]);
                  }
                  // save the metadata in service
                  this.timeNetDataService.newTimeNetData(this.fileName, name, gedVersion, form, charset);
              }
              // reading a person
              else if (currentRow.tag === 'INDI') {
                  let names: string[] = [];
                  let id: string = currentRow.id;
                  let dateOfBirth: string = '';
                  let dateOfDeath: string = '';
                  let sex: string = '';
                  currentRow = this.parseLine(lines[++line]);
                  // iterate until lvl 0 is reached again
                  while (currentRow.level !== 0) {
                      if (currentRow.level === 1 && currentRow.tag === 'SEX')
                          sex = currentRow.value;

                      if (currentRow.level === 1 && currentRow.tag === 'NAME')
                          names.push(currentRow.value);

                      if (currentRow.level === 1 && currentRow.tag === 'BIRT')
                      {
                          currentRow = this.parseLine(lines[++line]);
                          while (currentRow.level === 2)
                          {
                              if (currentRow.tag === 'DATE')
                                  dateOfBirth += currentRow.value;
                              if (currentRow.tag === 'TYPE')
                                  dateOfBirth += currentRow.value;

                              currentRow = this.parseLine(lines[++line]);
                          }
                      }
                      if (currentRow.level === 1 && currentRow.tag === 'DEAT') {
                          currentRow = this.parseLine(lines[++line]);
                          while (currentRow.level === 2) {
                            if (currentRow.tag === 'DATE')
                              dateOfDeath += currentRow.value;
                            if (currentRow.tag === 'TYPE')
                              dateOfDeath += currentRow.value;
                              currentRow = this.parseLine(lines[++line]);
                          }
                      }
                      if (currentRow.level === 1 && currentRow.tag === 'FAMS') {
                        /*this.timeNetDataService.addReleationShip(
                          id, currentRow.id, relationShipTypeEnum['Spouse-Of'], '', ''
                        );*/
                        this.timeNetDataService.addSpouseToFamily(currentRow.id,id);
                      }
                      if (currentRow.level === 1 && currentRow.tag === 'FAMC') {
                        /*this.timeNetDataService.addReleationShip(
                          currentRow.id, id, relationShipTypeEnum['Child-Of'], '', ''
                        );*/
                        this.timeNetDataService.addChildToFamily(currentRow.id,id);
                      }

                      currentRow = this.parseLine(lines[++line]);
                  }
                  // save the metadata in service
                  this.timeNetDataService.addPerson(id, names, sex, dateOfBirth, dateOfDeath);
              }
              else if (currentRow.tag === 'FAM')
              {
                let famId: string = currentRow.id;
                  // 0 - 1 husband or wife
                  let husband: string = '';
                  let wife: string = '';
                  let children: string[] = [];
                  currentRow = this.parseLine(lines[++line]);
                  while (currentRow.level !== 0) {
                      if (currentRow.tag === 'HUSB' || currentRow.tag === 'WIFE') {
                        this.timeNetDataService.addSpouseToFamily(famId, currentRow.id);
                      } else if (currentRow.tag === 'CHIL') {
                        this.timeNetDataService.addChildToFamily(famId, currentRow.id);
                      }
                      currentRow = this.parseLine(lines[++line]);
                  }
              }
              else if (currentRow.tag === 'TRLR') {
                  end = true;
              }
              else {
                  line++;
              }

          } else {
              line++;
          }
      }
      this.timeNetDataService.finishImport();
      console.log(this.timeNetDataService.getTimeNetData());
      console.log('loading finished - redirect to visualization');
      this.router.navigate(['vis']);
  }

  /**
   * Parses one single line of a gedcom file
   * @param line
   * src: https://github.com/dcapwell/gedcom.js/blob/master/lib/gedcom.js
   */
  private parseLine(line: String): RowData {
    let split = line.split(' '),
        lvl = split.shift().trim(),
        tmp = split.shift().trim(),
        id = null,
        tag = null,
        value = null;

    if (tmp.charAt(0) === '@') {
        // line contains an id
        id = tmp;
        tmp = split.shift().trim();
    }

    tag = tmp;
    if (split.length > 0) {
        value = split.join(' ');
        if (value.match(/@[^@]+@/)) {
            // contains a reference...
            // Family Tree Legends seems to put id in value some times, other times it will put it in id location...
            id = value;
            value = null;
        }
    }
    return <RowData> { level: +lvl, id, tag, value };
  }
}